java中使用zip4j创建带密码保护的文件

在java中创建zip文件问题不大，但如果要创建带密码保护的zip文件，则可以使用 
zip4j这个项目（下载地址：http://www.lingala.net/zip4j/download.php） 

zip4j还支持针对普通zip文件的crud，支持AES 128/256 的加密，支持分卷zip等很多功能 
下面看个例子： 

import java.io.File;
import java.util.ArrayList;

import net.lingala.zip4j.core.ZipFile;
import net.lingala.zip4j.exception.ZipException;
import net.lingala.zip4j.model.ZipParameters;
import net.lingala.zip4j.util.Zip4jConstants;

public class CreatePasswordProtectedZipExample
{
public static void main(String[] args)
{
try {
//创建zip文件
ZipFile zipFile = new ZipFile("C:/temp/test.zip");

//增加文件到zip中
ArrayList<File> filesToAdd = new ArrayList<File>();
filesToAdd.add(new File("C:/temp/test1.txt"));
filesToAdd.add(new File("C:/temp/test2.txt"));

//初始化各类参数
ZipParameters parameters = new ZipParameters();
//设置压缩模式
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);

//DEFLATE_LEVEL_FASTEST     - Lowest compression level but higher speed of compression
//DEFLATE_LEVEL_FAST        - Low compression level but higher speed of compression
//DEFLATE_LEVEL_NORMAL  - Optimal balance between compression level/speed
//DEFLATE_LEVEL_MAXIMUM     - High compression level with a compromise of speed
//DEFLATE_LEVEL_ULTRA       - Highest compression level but low speed
parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL);

//设置加密标志
parameters.setEncryptFiles(true);

//设置aes加密
parameters.setEncryptionMethod(Zip4jConstants.ENC_METHOD_AES);

//AES_STRENGTH_128 - For both encryption and decryption
//AES_STRENGTH_192 - For decryption only
//AES_STRENGTH_256 - For both encryption and decryption

parameters.setAesKeyStrength(Zip4jConstants.AES_STRENGTH_256);

//设置密码
parameters.setPassword("123456");

zipFile.addFiles(filesToAdd, parameters);
}
catch (ZipException e)
{
e.printStackTrace();
}
}
}